Customer Lifetime Value (LTV): How to Calculate It and Why It Drives Every Business Decision

What Is Customer Lifetime Value?

Customer Lifetime Value (LTV, also called CLV or CLTV) is the total revenue a business can expect from a single customer account over the entire duration of their relationship. LTV is the single most important metric for understanding how much you can afford to spend to acquire a customer (CAC) and still remain profitable. The basic LTV formula is: LTV = Average Purchase Value × Purchase Frequency × Average Customer Lifespan.

LTV Calculation Examples

For an e-commerce business: average order value $50, customers order 4 times per year, average customer stays for 3 years. LTV = $50 × 4 × 3 = $600. For a SaaS business: monthly subscription $99, average customer stays 24 months. LTV = $99 × 24 = $2,376. For a service business: average project value $2,000, clients return for 2 projects per year, average relationship 5 years. LTV = $2,000 × 2 × 5 = $20,000.

Gross Margin LTV

Basic LTV uses revenue figures. Gross margin LTV is more accurate for understanding true customer value: Gross Margin LTV = LTV × Gross Margin %. For a SaaS product with 80% gross margins and basic LTV of $2,376: Gross Margin LTV = $2,376 × 0.80 = $1,901. This is the actual contribution from each customer toward fixed costs and profit — a more meaningful figure for comparing against CAC.

How to Use Our Free LTV Calculator

Our free LTV calculator at cookiescursor.com calculates basic LTV and gross margin LTV from purchase value, frequency, lifespan, and gross margin. Optional CAC input calculates the LTV:CAC ratio instantly. Currency selector supports 40+ currencies. No signup required.

Frequently Asked Questions

What is a good LTV:CAC ratio?
3:1 is the commonly cited healthy benchmark for SaaS. Below 1:1 means losing money on every customer. Above 5:1 suggests underinvestment in growth.

How do I increase LTV?
Reduce churn (longer customer lifespan), increase purchase frequency, increase average order value through upsells and cross-sells, and expand to additional products or services.

Should I use historical or predictive LTV?
Historical LTV uses actual data from existing customers. Predictive LTV uses models to forecast future behavior. For planning, use historical data with conservative assumptions.

Is LTV the same as revenue per customer?
LTV is cumulative revenue over the entire customer relationship. Revenue per customer in a given period is a different metric that excludes future expected revenue.

How does churn affect LTV?
Dramatically. Halving your churn rate (doubling average customer lifespan) doubles your LTV. Churn reduction is often the highest-leverage LTV improvement strategy.

Can LTV be negative?
If the cost to serve a customer (support, infrastructure, returns) exceeds their revenue contribution, their net LTV is negative. Identifying and addressing these unprofitable customer segments is important for overall business health.

Calculate Your LTV Now

Use our free LTV calculator to understand customer lifetime value. No signup required.